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Asteroid 7 Iris

Available Resources

Asteroid 7 Iris Sky Charts and Coordinates

This is a simplified sky chart, showing where Asteroid 7 Iris is now with respect to the brightest stars and constellations.

More advanced sky charts are available on TheSkyLive for this object: 1) the Online Planetarium which is interactive and allows to select dates and additional objects to visualize; and 2) the Live Position and Data Tracker which provides the highest precision position data and features deep sky imagery from the Digitized Sky Survey.

Asteroid 7 Iris in Virgo on November, 15 2018
High Precision Live Sky Chart
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]
12h 05m 56s
-05° 38’ 04”
10.92

Asteroid 7 Iris Rise and Set Times

Today's Asteroid 7 Iris rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the Europe/London timezone.

Azimuth: 95.5°
Max altitude: 33.0°
Azimuth: 264.4°

Asteroid 7 Iris Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Asteroid 7 Iris with respect of the Sun and the orbits of the major planets. The position of Asteroid 7 Iris and the planets along their orbits in this diagram accurately represents the current configuration of the objects in the Solar System. This is an experimental feature and it requires a WebGL enabled browser. Please provide us feedback!

Asteroid 7 Iris Ephemeris

The following table lists the ephemerides of Asteroid 7 Iris computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Asteroid 7 Iris in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2018 Nov 08 11h 55m 06s -04° 19’ 06” 10.90 Virgo
2018 Nov 09 11h 56m 30s -04° 29’ 12” 10.91 Virgo
2018 Nov 10 11h 57m 53s -04° 39’ 18” 10.91 Virgo
2018 Nov 11 11h 59m 17s -04° 49’ 19” 10.91 Virgo
2018 Nov 12 12h 00m 38s -04° 59’ 20” 10.91 Virgo
2018 Nov 13 12h 02m 00s -05° 09’ 18” 10.91 Virgo
2018 Nov 14 12h 03m 23s -05° 19’ 13” 10.92 Virgo
2018 Nov 15 12h 04m 44s -05° 29’ 07” 10.92 Virgo
2018 Nov 16 12h 06m 03s -05° 38’ 57” 10.92 Virgo
2018 Nov 17 12h 07m 23s -05° 48’ 46” 10.92 Virgo
2018 Nov 18 12h 08m 44s -05° 58’ 32” 10.92 Virgo
2018 Nov 19 12h 10m 03s -06° 08’ 15” 10.92 Virgo
2018 Nov 20 12h 11m 21s -06° 17’ 56” 10.92 Virgo
2018 Nov 21 12h 12m 41s -06° 27’ 33” 10.92 Virgo

Distance of Asteroid 7 Iris from Earth

The following chart shows the distance of Asteroid 7 Iris from Earth as a function of time. Distance data is measured in Astronomical Units and sampled with a 2 days interval.

The reported distances might be inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of 7 Iris is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Asteroid 7 Iris from Earth between January 2013 and December 2075

Light Curve of Asteroid 7 Iris

The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid 7 Iris, according to the most recent ephemerides data. Magnitude data is sampled with a 2 days interval and there might be inaccuracies for objects changing brightness very rapidly during the course of a few days. For comets there could be large discrepancies between the observed and predicted brightness because of their highly dynamic behaviour.

Predicted magnitude of Asteroid 7 Iris between January 2013 and December 2075

Asteroid 7 Iris Physical Data

The following shows the known values of the most important physical parameters of Asteroid 7 Iris. Source: JPL Small-Body Database

Physical Parameter Value Relative to Earth
Diameter 199.83 km 0.0157
Sideral Rotation 7.1390 hours 0.2983
Absolute Magnitude 5.51
Geometric Albedo 0.2766

Asteroid 7 Iris Orbital Elements

The following table lists the orbital elements of Asteroid 7 Iris at epoch 26 April 2019 00:00 UTC (JD: 2458600.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.23120579
Orbit inclination i 5.52365144°
Perihelion distance q 1.83383083 AU
274,337,188 km
Aphelion distance Q 2.93683680 AU
439,344,533 km
Semi-major axis a 2.38533381 AU
356,840,860 km
Orbital period period 3.6800 years
1,345.6192 days
Date of perihelion transit Tp 2017-Nov-18 03:14:27
2,458,075.6350 JD
Next perihelion transit 2021-Jul-25 18:06
2,459,421.2542 JD
Argument of perihelion peri 145.26510345947°
Longitude of the ascending node node 259.56323263803°
Mean anomaly M 140.41965536039°
Mean motion n 0.26753483°/day
Closest approach to Earth* 2017-Oct-31
Distance of closest approach* 0.84895471 AU
127,001,816 km

* NOTE: values for the closest approach are computed for the time interval between 2013-Jan-01 and 2075-Dec-31, with a sampling interval of 1 day.